Gripper for platen printing-presses.



. No. 706,876. Patented Aug. I2, |902.

A. L. ANDERSON.

GRIPPER FR'PLATEN PRINTING PRESSES.

(Applicatin led Mar. 4, 1902.)

(No Model.)

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UNHED Srnrns ARTHUR L. ANDERSON, OF GRUNDY CENTER, IOXVA.

GRIPPER FOR PLATEN PRINTINGmPRESSES.

SPECIFICATION `forming part of Letters Patent No. 706,876, dated August 12, 1902.

Application iiled March 4,1902.

T0 a/ZZ whom it may concern:

Be it known that I, ARTHUR L. ANDERSON, of Grundy Center, in the county of Grundy and State of iowa, have invented a new and useful Improvement in Grippers for Platen Printing-Presses, of which the following is a specification.

My invention relates to an improvement in grippers for platen printing-presses, and has for its object to provide a simple and eflicient device for gripping the paperor other article to be printed on firmly to the platen.

My invention consists in the peculiar con# struction, arrangement, and combination of instrumentalities, as will be hereinafter fully set forth and claimed, reference being had to the drawings hereunto annexed, in Which- Figure lis a front elevation showing my improvement asin use. Fig. 2l is a bottom plan view of the gripper. Fig. 3 is a top plan View of the same. Fig. 4 isa transverse section through one of the slots of the gripper, showing the same in connection with a tympan gage and sheet. Fig. 5 is a fragmentary bottom plan view of a modified form of the invention. Fig. 6 is a longitudinal section online a; c of Fig. 5.

The gripper l is made of metal, and is secured to the gripper-bar 2 by a'screw-bolt 3, and is provided with slots ornotches 4: in the1 opposite longitudinal edges thereof, said slots or notches extending a distance greater than one-half thewidth of the gripper and located at any suitable point in the length of the same, but preferably arranged alternating on opposite sides,.so that any desired margin may be provided for. The purpose or function of these slots or notches is as follows: The slots onthe inner edge of the gripper are for use whena narrow margin is desired, and the notches or slots on the outside edge of the gripper are to allow gage-pins to pass through when a wide margin is desired, so that the inner edge of gripper will be close to the outside margin of the type. The notches or slots are designed to` allow the upright part of the gage-pin 5 to, pass through when the gripp'ersare depressed to the platen when the press is in motion, allowing the grippers to press down with their full surface on the paper that is being printed on, thereby enabling said paper to bc pulled Serial No. 96,593. (No inodel from the type. Wit-hout these notches the 'left-hand gripper would have to be removed from the press when the capacity thereof was being taxed with a full form. In all kinds of printing produced on a platen-press the left-hand gage-pin is an absolute necessity in order to produce good work. Few', if any, presses have sufficient room on the platen for a gage-pin and left-hand gripper at the same time when a full form is being worked. By providing the notches or slots on the edges of the gripper it is never necessary to remove ,the gripper from the press for any reason.

On the under side of gripper l provide the depressions or recesses 6, which extend from the inner ends of the slots to the opposite edge of the gripper. As stated, the notches or slots 4 are so cut and adjusted as to allow the gage-pin to pass through them. The depressions or recesses 6 are provided on the under side of the gripper to allow for and fit over any raise made by the portion of gagepin passing through the tympansheet 7 to pass up therein, and thus prevent the gripper from pressing down upon the said part of 'the gagepin which passes through the tympan-sheet and whereby the lower surface of the gripper will lie perfectly flat against the paper being printed on. The depressions orrecesses will in all lcases extend from the inner end of the slots or notches to the opposite edge of the gripper and in a straight line and parallel with the direction of the slots or notches.

It will be seen thatl provide a simp1e,cheap, and efficient gripper that will vfirmly hold the paper or article to beprinted onwhere a very Ynarrow margin is desired and one that may be so adjusted that the inner edge thereof will be in very close proximity to the desired outside line of the printing, thereby avoiding the annoyance so often experiencedk when it is desired to print upon an article so as to leave a very narrow margin where'the gripper ordinarily cannot be so placed as to hold the article to be printed upon by reason of the gage-pin coming in contact with the gripper. With the gripper ordinarily used it becomes necessary to have a strong rubber band stretched across the paper or to use paste board strips. These, however, are not satisfactory, for thc reason that they are not iirm,

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and slip from place, thus causing much trouble and annoyance. These defects are remedied by my device.

My device can be readily applied to any ordinary platen printing-press Without necessitating any material change in the structure thereof.

The recesses or depressions in the under face of the gripper may be of a greater Width than the slots or notches made in the edges, as shown in Fig. 5. The gripper may be adjusted along the gripper-bar to suit the particular character of the Work to be done.

While it is not absolute-ly necessary that the slots in the opposite edges of the gripper should be placed alternating, but may be placed wherever found most practicable, yet by giving them this alternating arrangement the strength of the gripper is not impaired, and by making the slots of such length that they extend across more than one-half the Width of the gripper, as more plainly shown in Fig. 3, any desired Width of margin may .be provided for.

Having thus described myinvention, What I claim as new, and desire to secure by Letters Patent, is-

1. In a printing-press, a gripper having transverse slots or notches in its edges adapted to receive the projecting portions of tympan gage-pins secured to the platen, substanlially as and for the purpose set forth.

2. In a printing-press, a gripper having transverse slots or notches in its inner edge, said slots or notches being adapted to receive the projecting portions of tympan gage-pins secured to platen of the press.

3. In a printing-press, a gripper having transverse slots or notches in its edges, and transverse recesses or depressions in its under face, said recesses or depressions being adapted to receive the shank portion of tympan gage-pins secured to the platen of the press.

4. In a printing-press, a gripper having transverse recesses or depressions in its under face, adapted to fit over the ridge caused by the shank of a gage-pin in the tympan-sheet.

5. In a printing-press, a gripper having transverse recesses or depressions in its under face, said recesses or depressions extending across the width of the gripper, adapted to fit over the ridge caused by the shank of a gagepin in the tympan-sheet- V 6. In a printing-press, a gripper having transverse slots or notches in its edges, and transverse recesses or depressions in its under face, said recesses or depressions extending from the inner end of the slots to the opposite edge of the gripper, substantially as and for the purposeset forth.

7. In aprinting-press, the combination with a platen, of a gripper having transverse slots or notches in its edges adapted to receive the projecting portion of tympan gage-pins secured to the platen, and means for securing the said gripper to the platen.

8. In a printing-press, a gripper having transverse slots or notches in its opposite edges alternately disposed.

9. In a printing-press, a gripper having transverse slots or notches in its opposite edges alternately disposed, and transverse recesses or depressions in its under face extending from the inner end of the slots to the opposite edge of the gripper.

10. In a printing-press, the combination With a platen, of a gripperhaving transverse slots or notches in its edges, transverse recesses or depressions in its under face eX- tending from the inner end of the slots to the opposite edge thereof, and means for securing said gripper to the platen.

1l. As an article of manufacture, a gripper having transverse slots or notches in its edges, and recesses or depressions in its under face, said recesses or depressions extending from the inner end of the slots to the opposite edge of the said gripper.

l2. In a printing-press, a gripper having slots or notches in its edges, and recesses or depressions in its under face extending from the inner end of the slots to the opposite edge of the gripper, said recesses or depressions being of a greater Width than the said slots in the edges of the gripper.

13. In a printing-press, the combination with the gripper-bar of the platen, of a gripper having transverse slots or notches in one of its edges, and means for securing the gripper to said platen, substantially as and for the purpose set forth.

14. A gripper for platen printing-presses, consisting of a bar having transverse slots on opposite edges extending across its width beyond the longitudinal center thereof.

ARTHUR L. ANDERSON.

Vitnesses:

H. E. MOFFITT, g F. XV. REISINGER.

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